https://sourceware.org/bugzilla/show_bug.cgi?id=28178
Bug ID: 28178
Summary: global-buffer-overflow on `nm-new -l`
Product: binutils
Version: 2.38 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: shaohua.li at inf dot ethz.ch
Target Milestone: ---
Created attachment 13587
--> https://sourceware.org/bugzilla/attachment.cgi?id=13587&action=edit
poc
Hi there,
I found a global-buffer-overflow on `nm-new -l` with a fuzzer.
- binutils version: 2.38(Head), commit af51804103a08cd1e12edc4f4a30eec2c5c4f9e8
- Compiler: clang12
- Platform: Ubuntu 18.04.5 LTS, x86_64
- Reproduce: run `nm-new -l poc`
AddressSanitizer report:
==668==ERROR: AddressSanitizer: global-buffer-overflow on address
0x000001828d10 at pc 0x0000011250a5 bp 0x7fffbb5830d0 sp 0x7fffbb5830c8
READ of size 8 at 0x000001828d10 thread T0
#0 0x11250a4 in rx_info_to_howto_rela
/binutils_latest/repo/bfd/elf32-rx.c:319:25
#1 0x6f7320 in elf_slurp_reloc_table_from_section
/binutils_latest/repo/bfd/./elfcode.h:1523:8
#2 0x6f685e in bfd_elf32_slurp_reloc_table
/binutils_latest/repo/bfd/./elfcode.h:1609:11
#3 0x5ce0ae in _bfd_elf_canonicalize_reloc
/binutils_latest/repo/bfd/elf.c:8577:9
#4 0x4e96db in bfd_canonicalize_reloc
/binutils_latest/repo/bfd/bfd.c:1579:10
#5 0x4d2276 in get_relocs /binutils_latest/repo/binutils/nm.c:913:25
#6 0x50e6ba in bfd_map_over_sections
/binutils_latest/repo/bfd/section.c:1383:5
#7 0x4d147a in print_symbol /binutils_latest/repo/binutils/nm.c:1037:8
#8 0x4ceaeb in print_symbols /binutils_latest/repo/binutils/nm.c:1152:7
#9 0x4cd23c in display_rel_file /binutils_latest/repo/binutils/nm.c:1279:5
#10 0x4c97dd in display_file /binutils_latest/repo/binutils/nm.c:1446:7
#11 0x4c90db in main /binutils_latest/repo/binutils/nm.c:1965:12
#12 0x7fb5125b10b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#13 0x41c55d in _start (/out_bin/nm-new+0x41c55d)
0x000001828d10 is located 72 bytes to the right of global variable
'rx_elf_howto_table' defined in 'elf32-rx.c:50:25' (0x1827620) of size 5800
SUMMARY: AddressSanitizer: global-buffer-overflow
/binutils_latest/repo/bfd/elf32-rx.c:319:25 in rx_info_to_howto_rela
Shadow bytes around the buggy address:
0x0000802fd150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000802fd160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000802fd170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000802fd180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000802fd190: 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9
=>0x0000802fd1a0: f9 f9[f9]f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000802fd1b0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000802fd1c0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000802fd1d0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000802fd1e0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000802fd1f0: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==668==ABORTING
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